将字符串转换为字符的迭代器。

//来 自 NowJava.com - 时  代  Java

//package com.nowjava;


import java.util.Iterator;

import java.util.Map;

import java.util.Map.Entry;


public class Main {

    /**

     * Converts a string to an iterator of characters.

     */

    public static Iterator<Character> toIterator(final String value) {

        return new Iterator<Character>() {

            int index = 0;


            @Override

            public boolean hasNext() {

                return index < value.length();

            }


            @Override/**from 时   代    Java - nowjava.com**/

            public Character next() {

                return value.charAt(index++);

            }


            @Override

            public void remove() {

            }

        };

    }


    /**

     * Wraps a map iterator with an iterator that returns tuples of [key,

     * value].

     */

    public static Iterator<?> toIterator(Map<?, ?> o) {

        final Iterator<?> it = o.entrySet().iterator();


        return new Iterator<Object>() {

            @Override

            public boolean hasNext() {

                return it.hasNext();

            }


            @Override

            public Object next() {